* HilariousInHindsight: In a very early strip, the first sign of Lancelot's homophobia comes when Arthur mentions Bedivere and Kay are "very close" and then has to tell him it's not what he thinks (because Bedivere's female). Two retcons later, it ''is''.
* MST3KMantra: Pretty much the only way to make Arthurian legend work when transplanted into the ''American'' Wild West.
* PuritySue: Galahad, who exists in a state of perfect Christian grace in the space arc. Justified, as this was his role in the original legends.
* RecycledScript: Some gags from ''King Arthur In Time And Space'' get adapted when the strip reaches the appropriate point. Arthur's webcomic occasionally reuses plots from Gadizowski's old LifeEmbellished comic.
* StrawCharacter: President Lucian in the modern arc falls into this with his speeches. It works both as a satire of politics and that this is the modern arc version of the Roman siege, so [[ForegoneConclusion we know Arthur will win the election anyway]].